Fluorine gas is placed in contact with calcium metal at high temperatures to produce calcium fluoride powder. What is th formula equation for this reaction?
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F2(0)+ Na(s) - NaF2(s)
F2(g) + Ca(s) — CaF2(1)
F2(g) + Na(s) A NaF2(1)
F2(g) + Ca(s) A CaF2(s)
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